Lawyers acting for British grandmother Lindsay Sandiford say she will challenge a death sentence imposed by an Indonesian court for drug smuggling.

The 56-year-old has given notice of her intention to appeal against the sentence, passed in January, at the country's highest court.

She lost her appeal over a UK Government refusal to fund her legal bid.

A spokesman for law firm Leigh Day, which is representing Sandiford, said: "Lindsay's lawyer has now given notice of her intention to appeal to the Indonesian Supreme Court against her death sentence.

"However, after the British Government's refusal to help, she still lacks the funding she needs to ensure she has a lawyer for the appeal itself. She is now reliant on the generosity of members of the British public to ensure this can take place."

The notification to appeal was lodged in Denpasar, Bali's capital.

Full documentation outlining the grounds of the appeal must be submitted to the Supreme Court within 14 days.

The High Court heard she needs around £8,000 to continue her legal fight. Over £6,000 has been donated to a Just Giving page set up to help fund the appeal.

Sandiford, from Cheltenham, was sentenced to death by firing squad by a court in Bali for taking £1.6 million of cocaine on to the island.

Earlier this month she lost the first appeal to the Bali High Court but will take her case to Indonesia's Supreme Court.

Balinese police said Sandiford was at the centre of a drugs-importing ring involving three other Britons, but she claimed she was forced to transport the drugs to protect her children whose safety was at stake.

She received the death sentence, despite prosecutors asking only for a 15-year jail term, after she was accused of damaging the image of Bali.

The Foreign and Commonwealth Office refused to fund her case as a matter of Government policy.